Touring G-Cans in Tokyo

Quoting Wikipedia's entry on Metropolitan Area Outer Underground Discharge Channel,

The G-Cans facility is also a tourist attraction and can be visited for free; however, as the tours are conducted in Japanese, a Japanese speaker must be present in the group to act as a translator for non-Japanese speakers.

I'd like to do this but can't find a lot of info.

For the Japanese speaker thing I was thinking maybe I could hire a translator (although I'm not sure how I'd go about doing that). But even if that's taken care of... at what times are the tours, what address do you go to, etc?

japan tours tokyo

Best Answer

This is a great question; I'm travelling to Japan next month and I'm tempted to add this to our itinerary. Codinghands did a great job of covering the basics. I read Japanese, so I can clarify some details.

There is an English-language overview of the Metropolitan Area Outer Underground Discharge Channel tour on the official website. It has links to sub-pages which give a lot of other information.

The tour starts from a building called the Ryukyukan (?Q?), Showa drainage pump station. The address is 720 Kamikanasaki, Kasukabe city, Saitama 344-0111.

Getting there by train: from central Tokyo, take JR to ?miya, then change to the Tobu Noda line to Minami-Sakurai Station (????). This should take just over an hour. From there it's 3km to the Ryukyukan, a 7-minute 1000-yen taxi ride or a 40-minute walk. Getting there by car: from the Tohoku Expressway's Iwatsuki Interchange, take Highway 16 towards Noda for about 17 km (30 minutes). From the Jouban Expressway's Kashiwa Interchange, take Highway 16 towards Noda for about 20 km (40 minutes). See the official Access Map for details.

The tours are 90 minutes long. About 10 minutes of that is in the "Underground temple", apparently. There are about 100 steps to climb. It is offered to ad hoc groups of 1-25 persons on Tues-Friday, at 10:00, 13:00, and 15:00, and to groups of 26-50 people on Mondays three times a day. The tour is in Japanese only, so each group with non-Japanese speakers must have at least one person who can translate safety instructions. If you come 30 minutes early, there is an 8 minute video in English which they can show.

Note that parts of the tour may be cancelled if, say, the tanks are full of floodwater. Children under the age of 5 are not allowed. Children from 5-19 years are allowed if accompanied by at least 1 adult per 5 children.

The tours are free, but prior reservations are required. The tour slots do fill up, so booking a few days in advance is helpful. You can book on the internet (Japanese language pages) starting 28 days before your desired tour time, ending 7 days before; or by phone on 048-746-0748 (in Japanese) from 28 days before to the day before. They want to you to arrive at the tour reception 30 minutes before tour time; latecomers will miss out.

For questions and to make reservations, call 048-746-0748 (in Japanese).

Other sources of information:

Wikipedia on Metropolitan Area Outer Underground Discharge Channel, as in the question
Wikivoyage page on Kasukabe, Saitama prefecture with a listing for the G-CANs tour.
Follow links from English-language overview of the Metropolitan Area Outer Underground Discharge Channel tour for "Group of 25people or less", and "Click here for Online Application" to get more details in English about the tour and the requirements to participate.

P.S. "???????? ?????" means "reception (desk) for the tour of the Metropolitan Area Outer Underground Discharge Channel". The term ???, which I translate as "tour", is ken gak-kai, or "see-learn-meet", which I think is a marvellously evocative term.